Ventilator.



A. G. WILSON.

' VENTILATOR. APPLICATION FILED JUNE 20, 1911,

urn s'rarns a ENT OFFICE.

ALEXANDER G. WILSON, OF CHICAGO, ILLINOIS.

VENTILATOBI.

- Specification of Letters Patent.

rename.

Application filed June 28, 1911. Serial No. 635,706.

by directing and deflecting air-currents past openings in the ventilator communicating through it with the inclosure to be ven' tilated.

In the accompanying drawing, Figure 1 shows. my improved ventilator by a View in front elevation; Fig. 2 is a section on line 2, Fig. 1, and Fig. 3 is a section on line 3, Fig. 2.

The ventilator as illustrated in the drawing and hereinafter described is of a shape especially adapting it to fit upon a rounded car-roof; but my improved construction may be embodied in any of various shapes of ventilator to adapt it to different applications. It is essentially of general boxform and is best constructed of sheet-metal. The base 4 is shown curved and contains an opening 5 to register with a vent-opening in a car-roof upon which the base seats-and is secured. The top 6, which is shown curved like the base, is imperforate and is connected at its side-edges with those of the base by imperforate outer side-walls 7, 7, lmperforate 'e nd or face-walls 8, 8 also connect the top and base but at some dis tance from their outer edges to form lower flanges 9, through holes 10 in which to fasten down the ventilator, and overhanging ledges 11 serving the purpose hereinafter explained. The walls 8 extend short of the side-walls 7 to form the open ends of air-passages hereinafter described. Inside the box thus constructed, and extending from top to bottom thereof at the opposite lateral edges of the base-opening 5, are straight walls 12, 12 having outwardly-projecting flanges 13 on their vertical edges. The inner walls 12 are parallel with the outer sidewalls 7 and form therewith airpassages 14 and 1.5 through the box. These inner sidewalls are connected at their flanged edges by inner end-walls 16, '16,

which also extend from top to bottom of the box. and have central openings 17, 17

which reach vfrom the top short of the base hereinafter explained; and at the side-e ges of the openings the walls 16 are lrned outwardly at an angle, as shown at 19, to render them deflecting-walls. The walls 12 and 16 form a centralchamber within the box' about the inlet-opening 5 in its base municate with the interior of the ventilated car or inclosure by way of the "chamber openings 17.

The ventilator, in operative osition, as on a car-roof with one of its wal s 8 and the in the directionof motion of the car in .CllCiltGCl by the arrow at 20 in Fig. 2, or on a stationary inelosure, works as follows: Alrbly deflected by it laterally and rush through the passages 14 and 15. In crossing the ends of the spaces between the walls 8 and 16 these air-currents exert suction through those spaces and through the openings 17 and 5 to exhaust the impure air fleeting action of the walls 16 by the tendency of their sections 19 to divert and thus through the openings 17. Moreover, the overhanging ledge 11 atthe wall facing the air-currents tends to augment the force of their action by confining them against upward deflection and resultant dissipation of their force. The imperforate side-walls 7 thoroughly protect the interior of the ven tilator from side-winds, with snow, rain, sleet and the like, but such winds in traversing the ends of the passages 14, 15 also through the ventilator by the courses hereinbet'ore described; and whether air-cup rents be exerted directly or at any angle against either the outer side or end walls,

enter the spaces between the walls 8 and 16 will be deflected outwardly by the wallfseetions 19 and deposit on the bottoms of said spaces behind the shields 18, which guard the openings 17 against the inward passage through them of such matter.

What I claim as new, and desire to secure bv Letters Patent, is-

1. A ventilator of the character described Patented Sept. 5, 1911.

to form there shields 18 for the purpose through which the passages 14 and 15 comadjacent ends of the passages 14, 15 facingv currents striking the face-wall 8 are forciexert suction thereat to exhaust impure air' tron-r the interior of the inclosure; and the force of the exhaust is enhanced by the deobstruct or crowd the eXit of the impure air such snow, rain or other foreign matter carried into the passages 14 and 15 that may comprising a box having imperforate outer end and slde Walls forming openings between their adjacent ends, a. base containing an nlet-opening, and a top, and a chamber 1 Within the box about saidopening formed of side-walls cooperating with said outer side-Walls to form air-passages extending between sald openlngs, and deflecting end- .w'alls provided with openings and forming with said outerend-wa11s spaces crossed at their ends by said passages, for the purpose set forth.

Y A ventilator of the character described comprising a box having imperforate outer end and side Walls 'formm openings be-' tween their ad acent ends, a base containing lngs, and end-walls provided With openings and forming with said outer end-walls spaces crossed at their ends bysaid passages, for the purpose set forth.

3. A ventilator of the character described comprising a box having imperforate outer end and side Walls forming openings between their adjacent ends, a base containing an in]et-opening, and a top, and a chamber within the box about said opening formed. of inner side-walls cooperating with said outer side-walls to form air-passages extending between said openings, and inner end-walls having outwardly-deflected sections forming openings and shields at the bases of the openings, said inner end-walls forming with said outer end-walls spaces crossed at their ends by said passages, for the purpose set forth.

ALEXANDER G. WILSON.

In presence of- A. U. THORIEU, R. SonAErER. 

